P4KE68 Equivalent & Substitute Parts

Part Overview

The P4KE68 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 58.1V reverse standoff voltage with 400W peak pulse power handling capability in a through-hole DO-204AL (DO-41) package. The P4KE68 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Active alternatives from multiple manufacturers provide identical or compatible electrical performance while maintaining current product status and supply availability.

Substiute Parts

P4KE68

Littelfuse Inc.In Stock: 984P4KE68 Datasheet

Current PartRFQ

P4KE68A

Taiwan Semiconductor CorporationIn Stock: 1120P4KE68A Datasheet

DirectRFQ

P4KE68A-AP

Micro Commercial CoIn Stock: 1018P4KE68A-AP Datasheet

MFR RecommendedRFQ

P4KE68A-BP

Micro Commercial CoIn Stock: 1170P4KE68A-BP Datasheet

MFR RecommendedRFQ

P4KE68A-G

Comchip TechnologyIn Stock: 780P4KE68A-G Datasheet

MFR RecommendedRFQ

P4KE68A-TP

Micro Commercial CoIn Stock: 1021P4KE68A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4KE68 is determined by strict equivalence across the following critical parameters:

• Reverse standoff voltage: 58.1V (Typ)
• Peak pulse current rating: 4.5A minimum
• Peak pulse power rating: 400W
• Package type: DO-204AL / DO-41 through-hole axial configuration
• Unidirectional operation: Single channel
• Zener diode type classification

All qualified substitute parts maintain these electrical and mechanical specifications. Variations in clamping voltage (92V to 96.6V range) and operating temperature maximums remain within acceptable substitution tolerances for general-purpose TVS applications. Substitute parts are sourced from Taiwan Semiconductor Corporation, Micro Commercial Co, and Comchip Technology, all providing active product status with current manufacturing and supply chain support.

Parameter Comparison

Engineering Selection Recommendations

Selection among substitute parts should prioritize active product status and compliance certifications:

P4KE68A (Taiwan Semiconductor Corporation) is the primary direct substitute, offering identical electrical specifications with ROHS3 compliance and active manufacturing status. This part is available in Tape & Reel packaging, suitable for automated assembly processes.

P4KE68A-TP, P4KE68A-AP, and P4KE68A-BP (all Micro Commercial Co) provide equivalent electrical performance with active product status. These parts are supplied in bulk packaging and maintain full compatibility with the original P4KE68 specifications.

P4KE68A-G (Comchip Technology) is functionally equivalent with ROHS3 compliance and active status. This option features a marginally lower peak pulse current rating of 4.35A and a reduced maximum operating temperature of 150°C compared to other substitutes. Selection of this part should be confirmed for applications requiring the full 175°C operating range or 4.5A peak pulse current.

All substitute parts maintain the critical 58.1V reverse standoff voltage, 400W peak pulse power rating, and through-hole DO-41 package configuration required for direct replacement in existing designs.

Frequently Asked Questions (FAQ)

Q: Can P4KE68A substitute directly for the obsolete P4KE68?

A: Yes. P4KE68A maintains identical reverse standoff voltage (58.1V), peak pulse power (400W), and through-hole DO-41 package configuration. The lower clamping voltage (92V vs 96.6V) represents improved performance characteristics within acceptable substitution parameters for general-purpose TVS applications.

Q: What is the difference between P4KE68A variants (TP, AP, BP, G)?

A: All variants share the same electrical specifications and package type. Differences are limited to manufacturer (Micro Commercial Co vs Comchip Technology), packaging format (bulk vs tape & reel), and minor operating temperature ranges. P4KE68A-G operates to 150°C maximum; all others operate to 175°C.

Q: Are all substitute parts ROHS3 compliant?

A: P4KE68A (TSC) and P4KE68A-G (Comchip) explicitly state ROHS3 compliance. Micro Commercial Co variants (TP, AP, BP) do not specify RoHS status in provided documentation. Verify RoHS compliance requirements with your supply chain if regulatory certification is mandatory.

Q: Can I use P4KE68A-G in applications requiring 175°C operation?

A: No. P4KE68A-G is rated to 150°C maximum junction temperature. For applications requiring full -55°C to 175°C operating range, select P4KE68A, P4KE68A-TP, P4KE68A-AP, or P4KE68A-BP.

Q: What packaging options are available for substitutes?

A: P4KE68A is supplied in Tape & Reel format for automated assembly. P4KE68A-TP, P4KE68A-AP, and P4KE68A-BP are supplied in bulk packaging. All maintain identical through-hole DO-41 axial lead configuration for manual or semi-automated insertion.

Q: Are there inventory considerations for part selection?

A: Current inventory levels are: P4KE68A (1065 pcs), P4KE68A-BP (1080 pcs), P4KE68A-TP (1006 pcs), P4KE68A-AP (934 pcs), and P4KE68A-G (709 pcs). Selection based on immediate availability should consider lead times and supply chain requirements for your production schedule.